Answer: When you create a document in Microsoft Publisher or any desktop publishing program, in order for others to open and view the file they would normally have to have the same program. If they don't, there are ways you can convert your creation to a format that others can use.
For other uses, see Epidemiology (disambiguation). Epidemiology is the study and analysis of the patterns, causes, and effects of health and disease conditions in defined populations. It is the cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.
epidemiology - The study of patterns of disease in a population. epidemiology - the study of the patterns, causes and control of disease in groups of people. epidemiology - Study of factors that influence the health and disease of a population and the use of this information to study diseases and improve the health of the population.